EP 0611810 A3 19970528 - Organic composite coated steel strip having improved electrocoating properties and corrosion resistance and method for making.
Title (en)
Organic composite coated steel strip having improved electrocoating properties and corrosion resistance and method for making.
Title (de)
Mit einem organischen Schichtstoff beschichteter Stahlstreifen mit verbesserten Elektrobeschichtungseigenschaften und Korrosionsbeständigkeit sowie Verfahren zur Herstellung.
Title (fr)
Bande d'acier revêtue d'une couche organique apte au revêtement électrolytique et résistante à la corrosion et méthode de préparation.
Publication
Application
Priority
- JP 2826393 A 19930217
- JP 17027893 A 19930709
- JP 17305993 A 19930713
Abstract (en)
[origin: EP0611810A2] An organic composite coated steel strip includes a chromate coating on a zinc or zinc base alloy plated steel strip having a weight of 5-500 mg/m<2> calculated as Cr and a resin coating on the chromate coating in a dry weight of 0.1-3 g/m<2>. The resin coating being of a composition comprising particulate silica, a binder resin, and 1-10 wt% of a polyamide, polyamine or polyimine resin wherein the silica particles have an average primary particle size of 5-30 nm and are agglomerated in the resin coating to form laminar aggregates having an average thickness of 0.2-2 mu m and an average diameter of 5-300 mu m. The coated steel strip is prepared by forming a chromate coating on a zinc or zinc base alloy plated steel strip and applying a coating composition to the chromate coating, followed by drying to form a resin coating. The coating composition contains (A) chain-linked fumed silica or organic solvent-dispersed silica sol, (B) a binder resin, and (C) a polyamide, polyamine or polyimine resin. The coated steel strip offers improved electrocoating properties, especially high image clarity after electrocoating as well as improved wet adhesion, rust prevention, low-temperature chipping resistance, and spot weldability, and is thus suited for automotive body outer panels.
IPC 1-7
IPC 8 full level
CPC (source: EP KR)
B05D 7/51 (2013.01 - EP); C09D 5/08 (2013.01 - EP); C23C 28/00 (2013.01 - KR)
Citation (search report)
- [A] WO 9301004 A1 19930121 - NIPPON KOKAN KK [JP]
- [A] CHEMICAL ABSTRACTS, vol. 119, no. 18, 1 November 1993, Columbus, Ohio, US; abstract no. 182979g, KUBOTA TAKAHIRO ET AL: "Anticorrosive and glossy organic composite-coated steel panels and their manufacture." page 129; column 2; XP002902976 & JP H0523639 A 19930202 - NIPPON KOKAN KK, et al
- [A] CHEMICAL ABSTRACTS, vol. 119, no. 16, 18 October 1993, Columbus, Ohio, US; abstract no. 162520x, KUBOTA TAKAHIRO ET AL: "Anticorrosive and glossy organic composite coated steel panels and their manufacture." page 128; column 2; XP002902977 & JP H0523640 A 19930202 - NIPPON KOKAN KK, et al
- [A] CHEMICAL ABSTRACTS, vol. 117, no. 14, 5 October 1992, Columbus, Ohio, US; abstract no. 133092n, TAKAO KENJI ET AL: "Galvanized steel sheets chromated and coated with resin-silica composite for corrosion resistance." page 106; column 2; XP002902978 & JP H0474571 A 19920309 - KAWASAKI STEEL CO
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0611810 A2 19940824; EP 0611810 A3 19970528; EP 0611810 B1 19991027; DE 69421304 D1 19991202; DE 69421304 T2 20000302; KR 100266232 B1 20000915; KR 940019884 A 19940915
DOCDB simple family (application)
EP 94102425 A 19940217; DE 69421304 T 19940217; KR 19940003007 A 19940217